<?php
/**
 * Copyright (c) 2021. ComboStrap, Inc. and its affiliates. All Rights Reserved.
 *
 * This source code is licensed under the GPL license found in the
 * COPYING  file in the root directory of this source tree.
 *
 * @license  GPL 3 (https://www.gnu.org/licenses/gpl-3.0.en.html)
 * @author   ComboStrap <support@combostrap.com>
 *
 *
 */

require_once(__DIR__ . '/../vendor/autoload.php');

use ComboStrap\Console;
use ComboStrap\ExceptionCompile;
use ComboStrap\ExceptionNotFound;
use ComboStrap\ExceptionTimeOut;
use ComboStrap\ExecutionContext;
use ComboStrap\FileSystems;
use ComboStrap\Lock;
use ComboStrap\LogUtility;
use ComboStrap\MarkupPath;
use ComboStrap\Meta\Store\MetadataDbStore;
use ComboStrap\Meta\Store\MetadataDokuWikiStore;
use ComboStrap\PluginUtility;
use ComboStrap\Reference;
use ComboStrap\References;


/**
 * Process metadata put them in the sqlite database (ie create derived index)
 *
 *
 * For the replication, this is the equivalent of the dokuwiki {@link \dokuwiki\Search\Indexer}
 * (textual search engine, plus metadata index)
 *
 * Note that you can disable a page to go into the index
 * via the `internal index` metadata. See {@link idx_addPage()}
 * ```
 * $indexenabled = p_get_metadata($page, 'internal index', METADATA_RENDER_UNLIMITED);
 * ```
 */
class action_plugin_combo_indexer extends DokuWiki_Action_Plugin
{

    /**
     * Bad canonical for now as we will add the
     * {@link \ComboStrap\ComboFs} system
     * but it's still a valid page
     */
    const CANONICAL = "replication";

    public function register(Doku_Event_Handler $controller)
    {

        /**
         * We do it after because if there is an error
         * We will not stop the Dokuwiki Processing
         *
         * We could do it after
         * https://www.dokuwiki.org/devel:event:parser_metadata_render
         * but it would then not be async
         *
         * Note: We support other extension for markup
         * but dokuwiki does not index other extension
         * in {@link idx_addPage} (page is the id)
         */
        $controller->register_hook('INDEXER_PAGE_ADD', 'AFTER', $this, 'indexViaIndexerAdd', array());

        /**
         *
         * https://www.dokuwiki.org/devel:event:parser_metadata_render
         *
         */


    }

    /**
     * @throws ExceptionCompile
     */
    public function indexViaIndexerAdd(Doku_Event $event, $param)
    {


        $lock = Lock::create("combo-indexer");
        try {
            $lock->acquire();
        } catch (ExceptionTimeOut $e) {
            // process running
            return;
        }

        /**
         * Get the q flag of the indexer
         * php bin/indexer.php -q
         */
        $verbose = true;
        if (PHP_SAPI === 'cli') {
            global $argv;
            foreach ($argv as $arg) {
                if ($arg === '-q') {
                    // Script was started with the -q flag.
                    $verbose = false;
                    break;
                }
            }
        }

        if ($verbose) echo 'ComboIndexer(): Indexer started'. DOKU_LF;

        try {
            /**
             * Check that the actual page has analytics data
             * (if there is a cache, it's pretty quick)
             */
            $id = $event->data['page'];
            $page = MarkupPath::createMarkupFromId($id);

            /**
             * From {@link idx_addPage}
             * They receive even the deleted page
             */
            $databasePage = $page->getDatabasePage();
            if (!FileSystems::exists($page)) {
                $databasePage->delete();
                return;
            }

            if ($databasePage->shouldReplicate()) {
                try {
                    $databasePage->replicate();
                } catch (ExceptionCompile $e) {
                    if (PluginUtility::isDevOrTest()) {
                        // to get the stack trace
                        throw $e;
                    }
                    $message = "Error with the database replication for the page ($page). " . $e->getMessage();
                    if (Console::isConsoleRun()) {
                        throw new ExceptionCompile($message);
                    } else {
                        LogUtility::error($message);
                    }
                }
            }

        } finally {
            if ($verbose) echo 'ComboIndexer(): Indexer finished'. DOKU_LF;
            $lock->release();
        }

    }


    function indexViaMetadataRendering(Doku_Event $event, $params)
    {

        try {
            $wikiPath = ExecutionContext::getActualOrCreateFromEnv()
                ->getExecutingWikiPath();
        } catch (ExceptionNotFound $e) {
            // markup string run
            return;
        }

        $page = MarkupPath::createPageFromPathObject($wikiPath);

        $references = References::createFromResource($page)
            ->setReadStore(MetadataDokuWikiStore::class);

        $internalIdReferences = $event->data['current']['relation']['references'];
        foreach ($internalIdReferences as $internalIdReferenceValue => $internalIdReferenceExist) {
            $ref = Reference::createFromResource($page)
                ->setReadStore(MetadataDokuWikiStore::class)
                ->setFromStoreValueWithoutException($internalIdReferenceValue);
            try {
                $references->addRow([$ref]);
            } catch (ExceptionNotFound $e) {
                LogUtility::internalError("The identifier and the value identifier should be known at this stage", self::CANONICAL, $e);
            }
        }

        try {
            // persist to database
            $references
                ->setWriteStore(MetadataDbStore::class)
                ->persist();
        } catch (ExceptionCompile $e) {
            LogUtility::warning("Reference error when persisting to the file system store: " . $e->getMessage(), self::CANONICAL, $e);
        }

    }


}